Bending apparatus.



H. ADERER.

BENDING APPARATUS.

APPLICATION FILED OCT. 16, 1914.

i 1%]. ,858. Patented June 1, 1915.

THE NORRIS PETERS co A =HOTO-LITHO., WASHINGTON, D

UNITED STATES PATENT @ETIQE.

HUGO ADERER, OF BLOOMFIELD, NEW JERSEY, ASSIG'NOR TO J. F. JELENKO & COIVL PANY, A COPARTNER-SHIP COMPOSED OF JESSE F. JELENKO AND HUGO ADERER, OF

NEW YORK, N. Y.

BENDING APPARATUS.

To all whom it may concern:

Be. it known that I HUGO ADERER, a citizen of the United States, residing at Bloomfield, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Bending Apparatus, of which the following is a full, clear, and exact specification.

This invention relates to bending machines and has particular reference to an apparatus especially adapted for bending flat or angular shapes of wire or rods without distorting the normal cross section thereof. In various lines of manufacture, and particularly in the manufacture of dental specialties, it is necessary to use flat, oval, or angular pieces of wire, which have to be bent sometimes on the flat side and again on the edges or faces without distorting the normal cross section. Moreover, wires or rods used for this purpose are in some instances of precious metal, in others of a base core with a precious metal covering, and in still other cases of base metal, but usually these materials are relatively soft and in order to be properly bentand fitted require special tools which will not mark or indent the surface, nor change the cross section.

The present invention has for its object to provide a bending apparatus comprising stationary and movable jaw members carrying detachable jaws or dies'which may be adapted to fit the particular shape of wire to be bent. Thus, this invention is adapted for bending a wide variety of Wire shapes by simple dies, or simple changes therein without damaging the wire or affecting its normal cross section. In the form shown, for example herein, the dies are particularly shaped for bending oval double edged wire 011 the edge without upsetting it, but of course, the invention is not limited to this particular shape of wire.

The bending lever and standard are arranged to face each other so that the stock being bent is easily visible and direct access to the space between the dies is provided. In work of this character, the edgewise bending must be done gradually and be under close observation to avoid warping the stock. By arranging the bending lever in front of the fixed die, the work and dies are readily visible and accessible at all times.

Specification of Letters Patent.

Patented June 1, 1915.

Serial No. 886,828.

By mounting the two end dies to face up ward they form a natural interrupted groove into which the work may be readily dropped in proper position with relation to the upper die. By placing these lower dies on the movable part a coordinated movement of both parts is made possible in positioning the work within the die grooves. The bending dies and surfaces are so arranged that the strip can be easily moved from the dies to the surfaces and vice versa, so that if the edgewise bending causes a sidewise warp, the strip by a simple movement may be positioned between the bending surfaces and trued. The grooved bending dies are rotatably adjustable on their supports to make the same width of groove adaptable to support strips of different and variable thicknesses and said dies are made adjustable transversely to a line through them so that they may be positioned to accurately support and bend strips of irregular form- In the accompanying drawings, Figure 1 shows in elevation one form of the invention; Fig. 2 is a plan view; Fig. 3 shows a slight modification, and Fig. 4 shows an elevation thereof on the section line l4 of Fig. 3.

1 represents a base having an upwardly curved extension 2, and having separated therefrom a fulcrum extension 3. The upwardly curved extension 2 is provided with a vertical hole in which is mounted a removable upper die member 4, which is adjustable vertically and can also be rotated in the support 2 and held in adjusted position by a set screw 5. The die proper is shown at 6, and as herein shown has a downwardly curved V-shaped slot 7 which corresponds generally with the outline of the wire to be bent. In Fig. 1, the extension 2 is also provided with a rigid bending or forming projection 8, having a rounded nose to cooperate with the bifurcated mov able jaw member.

The bifurcated movable body member consists of a handle 9 pivoted at 10 on the extension 3, and having its shorter end divided into two short arms 11, and located at opposite sides of the stationary aw member 2. The upper sides of the members 11 are rounded as shown at 12, so that wire can be bent between the two members 11 and S where desired. This is especially useful the movable member 9 overlies the fulcrum member 3, so that an uninterrupted surface is formed as at 17 over which the wire can be moved in and out of engagement with the forming dies 6, 14.

In Fig. 3, instead of extending thestationary member 2 to form a bending member 8, the upper die 18 is provided with an extension 19, which cooperates with the rounded surfaces 20 on the members 11 for the same purpose.

In operation, the operator positions the part to be bent within the lower grooves 15 making such adjustments of the dies 14: as are necessary to have the grooves properly support the work. The strip within the grooves 14 is then brought approximating the groove 7 of the upper die and said upper die is adjusted to properly fit and support the work. The handle 9 is then forcibly depressed to bend the work between the dies and close watch is kept to avoid carrying the edgewise bending to such an extent as to cause a sidewise warp. If such awarp, however, is unavoidable the work is removed from the dies, turned and placed between the adjacent bending surfaces and trued and then again positioned within the dies and so on until the proper contour has been attained.

It is believed that the operation will be fully understood from the foregoing description, it being seen that the various shapes of wire for special purposes can be rapidly and conveniently shaped as may be desired. In practice, I have found that it is possible by this apparatus to bend wire without affecting its cross section or indenting or marking it, and without waste by reason of injuring the outer surface thereof.

Various modifications and changes within 1 the scope of the appended claims may be made without departing from the invention.

What I declare as new and desire to secure by Letters Patent of the United States is l. A bending apparatus comprising a base, a movable member pivoted thereto, and grooved dies cooperating with each other carried by said respective members, said dies being adjustably mounted on their respective members for relativeadjustment toward and from each other.

2. A bending apparatus comprising a base, a movable member .pi'voted thereto, and grooved dies cooperating with each other carried by each of said members, said dies being relatively rotatably adjustable.

3. -A bending apparatus comprising relatively movable members, one member carrying one grooved die and the other member tions cooperating with said downwardly extending bending projection on the base, said projections also carrying cooperating transversely grooved dies.

5. In a strip bending appliance, the combination with a base having a C-shaped standard rising therefrom and carrying a downwardly facing grooved die, of a bending lever pivoted to said base in front of the opening of said standard and having bifurcations carrying grooved dies cooperating with the die'carried by the standard.

6. Ina strip bending appliance, the combination with a base having a C-shaped standard rising therefrom and carrylng a downwardly facing grooved die and adjacent bending surface, of a bending lever pivoted on the base having bifurcations pro vided with grooved dies and ad acentbendingsurfaces cooperating wlth the aforementionedgrooved die and bending surface re-- spectively. I V V 7. In a strip bending implement, the combination with a base having an overhanging standard rising therefrom and carrying a downwardly facing die and' adjacent bending surface, of a bending lever pivoted to said base in front of the overhang on the standard and having bifurcations provided with a die and adjacent bending surfaces cooperating with the die and bending surface on the standard.

In testimony whereof I affix my signature, in presence of two witnesses.

I I HUGO ADERER.

VVitnesses'i-l FRANK L. RYAN, J. WoosTER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

